US 11,674,394 B2
Gas turbine engine rotor assembly and method of using same
Franco Di Paola, Montreal (CA); and Julien Lalonde, Varennes (CA)
Assigned to PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed by PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed on Feb. 11, 2021, as Appl. No. 17/173,493.
Prior Publication US 2022/0251957 A1, Aug. 11, 2022
Int. Cl. F01D 5/02 (2006.01); F01D 5/06 (2006.01); F01D 5/08 (2006.01)
CPC F01D 5/022 (2013.01) [F01D 5/025 (2013.01); F01D 5/066 (2013.01); F01D 5/087 (2013.01); F05D 2240/24 (2013.01); F05D 2250/73 (2013.01); F05D 2260/4031 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A gas turbine engine rotor assembly configured to rotate around an axis, the rotor assembly comprising:
a first disc having a first body extending circumferentially and radially around the axis, a first set of circumferentially distributed blades protruding radially from the first disc, and a male spline extending axially relative the first body, the male spline extending around and along the axis, and
a second disc having a second body extending circumferentially and radially around the axis, a second set of circumferentially distributed blades protruding radially from the second disc, and a female spline extending around and along the axis, the female spline receiving the male spline in a spline engagement;
wherein the female spline includes a plurality of elongated, axially oriented grooves defined in a radially inner surface of the second disc, the grooves being circumferentially interspaced from one another, and the male spline includes a plurality of elongated, axially oriented keys protruding radially outwardly on a radially outer surface of the first disc, each one of the keys being snugly engaged within a corresponding one of the grooves to form the spline engagement;
wherein the first body and the second body have complementary cylindrical surfaces defining a spigot engagement therebetween.